Good to know.. I was actually thinking of buying StatTracker (I had it last year when I had a BB).. I'd have been ticked when I realized it wouldn't work.Safari is pretty good on the iPhone for yahoo sports, but I too wish there was an app for it. What really kills me is you can't use stat tracker because it requires flash.
Check out my newest app called Y! Fan at www.yfanapp.com
It just got added to the app store and is now available for download. It provides an iPhone specific interface to manage your Yahoo! FantasySports teams. You can set your roster, view your standings, track live scores via boxscores or stat tracker (if you have it), and more.
Future versions will add support for transactions, message board access, among other things.
Take a look. I know it will accomplish exactly what you (and hopefully thousands of others) are looking for.
Glad to hear the positive feedback so far. The current version doesn't have a ton of features at this point outside of what we felt were core to the app. (Changing rosters, viewing stats, accessing boxscores, etc...). We have added a number of additional features already and should have an upgrade ready to go in short order (pending apple's approval of course) that will add message board support, add some more stats, make it easier to add your teams, and improve some usability aspects.
I have been using it personally for weeks now...about eight times a day...lol!